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目的:通过这种新型的模型眼比较各种人工晶状体(以Tecnis为代表的非球面晶状体、以Array为代表的多焦晶状体及以EPOCH为代表的传统单焦球面晶状体)植入术后的功能视力。方法:我们这种新型的模型眼是根据理论模型眼的光学特性设计而来的。该模型眼是由一个焦距为35mm的球面设计的摄影镜头、一个置于房水的人工晶状体、一个电荷耦合照相机(CCDcamera)构成,图像分析采用目前国际上标准的商业化遥感处理软件系统。结果:模型眼和人眼具有相似的调制传递函数(modula-tiontransferfrequency,MTF)。模型眼所成的像和植入人工晶状体的眼睛所成的像相似,光阑的孔径和人工晶状体的屈光度可以改变,也可将镜片置于摄影镜头之前。结论:该模型眼能够即时的给出人工晶状体植入术后所成的像,让我们可以直接观察到模型眼构成的图像而不是数据,并能显示出各种人工晶状体的差异。
OBJECTIVE: To compare the post-implantation function of various intraocular lenses (aspherical lens represented by Tecnis, multifocal lens represented by Array, and conventional monofocal spherical lens represented by EPOCH) with this new model eye vision. Methodology: Our new model eye is based on the optical properties of the theoretical model eye. The model eye is composed of a 35mm spherical focal lens, an intraocular lens placed in the aqueous humor, and a CCDCamera. The image analysis is based on the world-standard commercial remote sensing software system. Results: The model eye and human eye had similar modulation transfer function (MTF). The model eye resembles an image made by the eye that is implanted in the IOL. The aperture of the iris and the refractive power of the IOL can be changed, or the lens can be placed in front of the camera. CONCLUSIONS: The model eye was able to give instant images of intraocular lens implantation, allowing us to directly visualize the images of the model eye rather than the data and to show the differences in various intraocular lenses.